Helpful Features:

  • Where possible we have used meaningful ‘ALT’ text and ‘TITLE’ text for images to provide descriptive text when you hover over images on the site.”
  • We have used descriptive hyperlink text (no ‘click here’ links)
  • We have avoided the use of frames, which are difficult for special browsers to interpret
  • We are also working hard to make sure our site has useful content that is laid out in an easy-to-navigate way

To change the size of the Text:

Select ‘View’ or ‘Zoom’, or  ‘Text size (100%)’, then select desired size. ‘Text size (100%) is usually the default original text size. If you have problems changing your settings, use the Help menu in your browser toolbar.


Some of our documents/publications are available from the website as Adobe® Acrobat® PDF files (Portable Document Format). You must have Acrobat Reader® software to download PDF files which is freely available from If you experience any difficulty opening a PDF file, please check that you have downloaded the latest version of the Acrobat Reader® software before contacting us.

You may also have to enable pop-ups for this site on your browser to view text documents.

Last updated: 2018